If your GPA is from a competitive college and you get 21 or 22+ on DATs, its hopeful. My friend took it mid Sept, got a 20, had a 3.7 Science GPA at UCLA undergrad, and got the interviews for the UCLA dental school "waiting list spots" (that MIGHT open up) cus all the seats were already filled. He lucky got in cus someone else has decided to decline LA's offer. And I know Pacific fills its seats fast. You'll be competitive but there might not be too many seats open for you.
Also, UCLA starts looking at apps the latest, they begin in Oct. Still, he was able to just slip in.